Scaffold



p 1957 a. VON DRASEK ETAL 2,805,902

SCAFFOLD Filed Dec. 29, 1952 2 Sheets-Sheet 1 INVENTORS 2/012, till /a9/2 $232 Zinnia l gspj ominic Sept. 10, 1957 J. VON DRASEK ETAL2,805,902

SCAFFOLD Filed Dec. 29, 1952 '2 Sheets-Sheet 2 ilniteei Fatent scarrotnJoseph Von Drasek and Dominick l t i. De Canio, Qhieago, 31., assignorsto Universal Form Clamp Con, filneago, 111., a corporation ofApplication December 29, 1952, deriai No. 328,325

1 Claim. (Ci. 3il4-14) .This invention relates to scafiolds and isparticularly concerned with an improved form of scaffold for use withconcrete wall forms.

In the construction of concrete walls and the like, it is frequentlynecessary to employ scaifolding to enable the workmen to assemble theforms and pour the concrete at successively higher elevations of thestructure. Various types of scaffold brackets have been designed for usein such work and, generally, such brackets have been secured to thesides of the wall form by fastening the inner portion of the bracket tothe form panels or to one or more horizontal wooden stringers which areused for alining the form panels. Scaffold brackets heretofore in usehave been objectionable in that it took considerable time and effort toassemble and dismantle the scaffold in moving from one position to thenext. A type of wall form in wide use today is one having panelscomprising a metal frame and a non-metallic facing such as is disclosedin the Anderson patent, No. 1,970,547.

The principal objects of the present invention are to provide a scafioldfor use with the metal frame type panel form which is readily attachableto the frame portion of such panel forms for support; to provideimproved demountable means for securing the scaffold to the horizontalframe members of the panel forms; to provide a scafiold bracket havingmeans for firmly anchoring the scafiold planking in position thereon,whether such planking is of single thickness or of double thickness byvirtue of overlapping of the adjoining ends of the boards; to provide ascaffold which may be readily assembled and dismantled by unskilledworkmen; and to provide a scaffold afiording all of the aforementionedadvantages which is relatively simple to manufacture, extremely durable,and economical.

An illustrative embodiment of this invention is shown in theaccompanying drawings, wherein:

Figure 1 is an end elevation of an improved scaffold to which thisinvention is applied, part of a concrete wall and a panel form beingshown in section;

Figure 2 is a horizontal section taken along the line 22 of Figure 1;

Figure 3 is an enlarged perspective view of one of the clamps used indetachably securing the bracket to the horizontal frame members of thepanel form;

Figure 4 is a fragmentary top plan vie-w of the structure illustrated inFigure l, but showing overlapping planking on the scafiold;

Figure 5 is a vertical transverse section, taken along the line 5-5 ofFigure 4;

Figure 6 is a transverse section, partly broken away, taken along theline 6-5 of Figure 5.

In the illustrated embodiment 'of the invention, the improved scaffold 7is used in connection with the construction of a concrete wall 3 whereinmodern metal frame panel forms 9 are employed. Each of the panel formscomprises a frame 1% of T-members, made of steel or the like, supportinga wooden panel 11 in flush relation to the short leg of the T-member.

EQQ

The frame 10 includes a pair of side members 12, top and bottom members13, and reinforcing Temembers 14 which extend between the side members12 of the metal frame on the outer face of the wooden facing member 11.The size of the frame members and the vertical spacing of thereinforcing members 14, of course, depend upon the size of the panelform and the strength required therefor to support a maximum concreteload. Generally, however, the spacing between the members 14 is uniformand only the number of such members varies with the size of the panelform.

The web portion of the members 14 projects outwardly from the concreteengaging wooden panel 11, and this projecting portion of the members 14-may be used for supporting the scaffold which is the subject of thepresent invention. Also, it will be apparent from the drawings that theT-member 13, forming the top and bottom of the panel supporting frame19, has a leg projecting outwardly the same distance as the members 14and, therefore, may also be used in the same manner.

The scaffold 7 comprises generally two or more brackets 15 which aresecured in aligned relation along the concrete retaining panel forms 9and support a platform 16 and a hand rail 17. Each of the brackets 15 isformed preferably of angle members and includes a platform supportingT-shaped frame having a cross bar or member 18 fixed, as by welding, toa relatively long member 19. The cross bar 18 is adapted for support bythe upper face of the web portion of a selected one of the form members13 or 14, with the longer member 19 extending outwardly from the form tosupport the scaffold planking 16. a

The member 19 has fixed thereto, at an intermediate portion within easyreach of the wall being constructed;

an upright angle member 2a? which forms the inner limit for the platform16. The outer end of the member 19 has fixed thereto, as by welding,another upright member 21 which is considerably longer than the firstmember 19 and provides at its upper end a support for the hand rail 17.

The upright members 26 and 21 are positioned on the same side of thehorizontal member 19 with their trans-- verse flange portions 23.1 and21.1, respectively, similarly disposed. to provide for alignment of aplurality of open-' ings 29.2 and 21.2 formed in these transverseflanges These openings provide means for the insertion of-a rod 23, orthe like, to maintain the platform or planking 16 in position'on thebracket 15. As illustrated, the rod 23 may have a pin 24 at one end andbe threaded at the other end to receive a nut 25, so that the rod may bereadily inserted in a pair of the aligned openings 22 "to hold a singlethickness of planking in place (Figure l), or it may be inserted inanother pair of the aligned openings 22 to accommodate the planking at apoint of overlap (Figures 4 and 5). Obviously, the described structuremay be readily adapted to fit planking having a thickness within anydesired limits. Furthermore, the rod 23 may be provided with a series oftransverse openings 22 therethrough to accommodate nails 25 or the likefor more firmly securing the planking 16 in position.

As noted previously, the upper end of the upright member 21 supports thehand rail 17, and for assisting therewith a channel section. A'sectionof the web of the channel formed by the members 21 and 27 is cut out toprovide a U-shaped portion which is open at its upper end to receive thehand rail 17 (Figure 5). Suitable openings may be provided in the flange21.1 of the upright member 21, if desired, to permit driving nails 21.3into the hand rail to more firmly secure it to the scaffold. As

, shown in Figures 1 and 5, the uprightmember 21 is dis- I Q posed at'aslight angle with respect to the vertical in order .to provide maximumusage of the floor space on the scaffold without detracting in any wayfrom the usefulness of the hand rail.

To provide adequate support for the scaffold, there is a T-shaped brace28 which'includes a cross bar or member 29 for bearing on the uppersurface of'the Web portion of one of the members 13 or 14, and a braceor strut 30 which extends upwardly at an angle from the cross bar 29 toa-pivotal connection, as by a bolt 31, with an intermediate portion ofthe member 19. The brace 28 is, of course, designed to fit the spacingof the horizontal members of the panel forms.

"For firmly securing the cross bars 18 and 29m the horizontal members ofthe forms, there'is provided locking clamp 32, which may be easily andquickly put in place to effectively lock these members in position.

As seen in Figure 3, this clamp is preferably in the form V of a castingwhich has an integrally formed pin 33 at one end of a short bar member34, and a transverse'yoke portion 35 at the other end of the bar.'Asnoted in Figure 4, a pair of the clamps 32 is arranged onrespectively opposite sides of the member. 19 and each of the clamps ispositioned with its pin 33 extending through aligned openings in thecross bar 18 and the underlying frame member of the form. The clamp isthen pivoted'about the axis of the pin 33 until the yoke 35 firmlyembraces the cross bar "18 and the form frame member to prevent relativevertical movement therebetween.

A second pair of the clamps 32 is similarly positioned on the cross bar29 on respectively opposite sides of the brace '28 to secure the formerin position on one of the horizontal members of the panel frame. It ispreferred, of course, that the spacing between the two legs of the yokeportion 35 be approximately equal to' the thickness of the overlappingportions of the form frame member and the cross bar 18 or 29, so thatthe yoke may be held in looking position throughfrictional engagementwith 'the overlapping portions of the panel forms and'the However, inthe event such condition.

scaffold bracket. does not exist, there is provided a pair of openings36 through the intermediate portion of the clamp for inserting a pin orbolt 37 through the clamp and aligned openings in the underlyingmembers, as seen in Figure l, to prevent the clamp from pivoting aboutthe axis of the pin 33.

From the foregoing description, it is seen that the scaffold bracket isreadily positioned by placing the cross bars 18 and 29 on horizontalframe members'of the panel forms and securing them in place by use ofthe clamps 32. The scaffold planking .can thenbe put in place. onadjoining pairs of brackets and fastened by means of the rods 23. Withthe positioning of the hand rail '17, the scaffold is then ready foruse. The reverse procedure, of course, is followed in dismantling thescatfold.

Thus there is provided a scaffold for use with concrete forming panelswhich combines rigidity and strength with ease of assembly in utilizinga simplified construction of relatively light weight and of economicaldesign. Furthermore, the elements of the scaffold supporting bracket arecompact in form and require a minimum of space during storage ortransportation to and from the construction site. While there has beenillustrated and described a particular form of construction embodyingthe invention, it is 'to be understood that it is not intended totherebylimit the invention. Various other modifications of the invention,without departing from the spirit thereof,'will become apparent to thosefamiliar with the art involved.

We claim:

In combination with a concrete wall panel form having a plurality ofvertically spaced, horizontally disposed rame members includinglaterally extending flange portions, a scafiold supporting bracketformed of metal angle members and comprising a generally horizontallydisposed first T-shaped frame including a cross bar and a leg member,said cross bar being supported on one of said flange portions of thepanel frame, a pair of upright members fixed in spaced apart relation onsaid leg member of said first T-shaped frame with one of said uprightmembers disposed adjacentthe free end of said leg member and includingmeans adjacent its upper end for supporting a hand rail, a platformretaining means extending between said upright members and detachablysecured thereto at a selected pair of a plurality of vertically spacedpositions of attachment provided on said upright members, said platformretaining means being adapted to hold platform members disposedtransversely of said leg member inposition between saidupright members,a second T-shaped frame including a leg portion and a cross member andhaving the free end of said leg member pivotally attached to said legmember of said first T-shaped frame at a position intermediate saidupright members, said'cross memher being supported on another of saidflange portions 7 below said one flange portion of the panel frame whichis engaged by said first T-shaped frame, and removable means securingsaid cross bar and said cross member to said. one flange portion andsaid other'flange portion, respectively.

References Cited in the file of this patent 9 UNITED STATES PATENTS1,449,638 Trester Mar. 29, 1923 2,136,696 Lamb Nov. 15, 1938 2,573,086Yoshimoto Oct. 30, 1951 2,577,979 Pierson, et'al. Dec. 11, 19512,605,074 Bucsko, et al July 29, 1952 FOREIGN PATENTS r 51,766.Switzerland of 1911

